They both die at the end:

In a near-future New York City where a service alerts people on the day they will die, teenagers Mateo Torrez and Rufus Emeterio meet using the Last Friend app and are faced with the challenge of living a lifetime on their End Day

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Bibliographic Details
Main Author: Silvera, Adam 1990- (Author)
Format: Book
Language:English
Published: New York Harper, an imprint of HarperCollinsPublishers [2017]
Edition:First edition
Subjects:
Summary:In a near-future New York City where a service alerts people on the day they will die, teenagers Mateo Torrez and Rufus Emeterio meet using the Last Friend app and are faced with the challenge of living a lifetime on their End Day
Physical Description:373 pages 22 cm
ISBN:9780062457790
9780062688514

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Interlibrary loan Place Request Caution: Not in THWS collection!